Fortinet MR1 - Manual (Page 365)

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The value for authentication key [key] must be 16 bytes or less. The [key] is composed of
standard displayable, non-control keystrokes from a Standard 101/102-key keyboard. If the
value of <type> is encrypt, a keyid in the range of 0 and 255 must be specified.
Syntax
ip rip authentication {none | {simple <key>} | {encrypt <key> <keyid>}}
no ip rip authentication
none - This command uses no authentication.
simple - This command uses simple authentication for RIP authentication .
encrypt - This command uses MD5 encryption for RIP authentication.
<key> - 16 alpha-numeric characters to be used for authentication key.
<keyid> - a value in the range of 0 – 255 to be used for MD5 encryption.
no - This command sets the default RIP Version 2 Authentication Type.
Default Setting
None
Command Mode
Interface Config
6.6.2.12 ip rip receive version
This command configures the interface to allow RIP control packets of the specified
version(s) to be received.
The value for <mode> is one of: rip1 to receive only RIP version 1 formatted packets, rip2 for
RIP version 2, both to receive packets from either format, or none to not allow any RIP
control packets to be received
Syntax
ip rip receive version {rip1 | rip2 | both | none}
no ip rip receive version
no - This command configures the interface to allow RIP control packets of the default version(s) to be
received.